JP2016540629A5 - - Google Patents

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JP2016540629A5
JP2016540629A5 JP2016525568A JP2016525568A JP2016540629A5 JP 2016540629 A5 JP2016540629 A5 JP 2016540629A5 JP 2016525568 A JP2016525568 A JP 2016525568A JP 2016525568 A JP2016525568 A JP 2016525568A JP 2016540629 A5 JP2016540629 A5 JP 2016540629A5
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nanofiber web
fibers
filtration medium
number average
average diameter
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Figure 2016540629
Figure 2016540629
次に、本発明の好ましい態様を示す。Next, a preferred embodiment of the present invention will be shown.
１． −２０ｋＶまでの静電荷、約７０％〜約９９．９９％の濾過効率範囲、及び０．３直径ミクロン粒子における約２．５ｍｍｗｇ未満の空気抵抗を有する単一ソースのランダムに混ざり合わされた繊維ネットワークを含む単一層ポリマーエレクトレットナノファイバーウェブを含む空気濾過媒体。1. Single source randomly mixed fiber network with electrostatic charge up to -20 kV, filtration efficiency range of about 70% to about 99.99%, and air resistance of less than about 2.5 mmwg on 0.3 diameter micron particles An air filtration medium comprising a single layer polymer electret nanofiber web comprising:
２． 前記ナノファイバーウェブは、2. The nanofiber web is
（ａ）前記ナノファイバーウェブにおける繊維の少なくとも約６５個数％は、約１０００ｎｍ未満の数平均直径を有するナノファイバーであることと、  (A) at least about 65 number percent of the fibers in the nanofiber web are nanofibers having a number average diameter of less than about 1000 nm;
（ｂ）前記ナノファイバーウェブにおける繊維の多くとも約３０個数％は、約１．０μｍ〜約３．０μｍの数平均直径を有するマイクロファイバーであることと、  (B) at most about 30% of the fibers in the nanofiber web are microfibers having a number average diameter of about 1.0 μm to about 3.0 μm;
（ｃ）前記ナノファイバーウェブにおける繊維の多くとも約５個数％は、約３．０μｍを超える数平均直径を有する粗繊維であることと、  (C) at most about 5% of the fibers in the nanofiber web are coarse fibers having a number average diameter greater than about 3.0 μm;
を含む、上記１に記載の空気濾過媒体。  The air filtration medium according to 1 above, comprising:
３． 前記ナノファイバーウェブは、少なくとも約７０％の多孔性、多くとも約１５μｍの平均流量孔サイズ、及び１２５Ｐａで約８７０ｃｍ3. The nanofiber web has a porosity of at least about 70%, an average flow pore size of at most about 15 μm, and about 870 cm at 125 Pa. 3Three ／ｃｍ/ Cm 22 ／分〜約６０００ｃｍ/ Min to about 6000cm 3Three ／ｃｍ/ Cm 22 ／分のフレーザー空気透過性を有する、上記１に記載の空気濾過媒体。2. The air filtration medium as described in 1 above, having a Fraser air permeability per minute.
４． 前記ナノファイバーウェブは、約５〜約１００ｇ／ｍ4). The nanofiber web is about 5 to about 100 g / m. 22 の目付を有する、上記１に記載の空気濾過媒体。2. The air filtration medium according to 1 above, having a basis weight of
５． 前記ナノファイバーウェブは、約１０ｇ／ｍ5. The nanofiber web is about 10 g / m 22 〜約６０ｇ／ｍ~ 60g / m 22 の目付を有する、上記１に記載の空気濾過媒体。2. The air filtration medium according to 1 above, having a basis weight of
６． 前記ナノファイバーウェブは、約１０ｇ／ｍ6). The nanofiber web is about 10 g / m 22 〜約２０ｇ／ｍ~ About 20g / m 22 の目付を有する、上記５に記載の空気濾過媒体。6. The air filtration medium according to 5 above, having a basis weight of
７． 前記ナノファイバーウェブは、ポリプロピレン、及びブレンド物におけるポリプロピレンが異なるポリプロピレン−ポリプロピレンブレンド物からなる群から選択されるポリマーを含む、上記１に記載の空気濾過媒体。7). The air filtration media of claim 1, wherein the nanofiber web comprises a polymer selected from the group consisting of polypropylene and a polypropylene-polypropylene blend in which the polypropylene in the blend is different.
８． 前記ナノファイバーウェブは、遠心溶融紡糸プロセスによって作製される、上記１に記載の空気濾過媒体。8). The air filtration medium according to 1 above, wherein the nanofiber web is produced by a centrifugal melt spinning process.

Claims (3)

−２０ｋＶまでの静電荷、約７０％〜約９９．９９％の濾過効率範囲、及び０．３直径ミクロン粒子における約２．５ｍｍｗｇ未満の空気抵抗を有する単一ソースのランダムに混ざり合わされた繊維ネットワークを含む単一層ポリマーエレクトレットナノファイバーウェブを含む空気濾過媒体。   Single source randomly mixed fiber network with electrostatic charge up to -20 kV, filtration efficiency range of about 70% to about 99.99%, and air resistance of less than about 2.5 mmwg on 0.3 diameter micron particles An air filtration medium comprising a single layer polymer electret nanofiber web comprising: 前記ナノファイバーウェブは、
（ａ）前記ナノファイバーウェブにおける繊維の少なくとも約６５個数％は、約１０００ｎｍ未満の数平均直径を有するナノファイバーであることと、
（ｂ）前記ナノファイバーウェブにおける繊維の多くとも約３０個数％は、約１．０μｍ〜約３．０μｍの数平均直径を有するマイクロファイバーであることと、
（ｃ）前記ナノファイバーウェブにおける繊維の多くとも約５個数％は、約３．０μｍを超える数平均直径を有する粗繊維であることと、
を含む、請求項１に記載の空気濾過媒体。 The nanofiber web is
(A) at least about 65 number percent of the fibers in the nanofiber web are nanofibers having a number average diameter of less than about 1000 nm;
(B) at most about 30% of the fibers in the nanofiber web are microfibers having a number average diameter of about 1.0 μm to about 3.0 μm;
(C) at most about 5% of the fibers in the nanofiber web are coarse fibers having a number average diameter greater than about 3.0 μm;
The air filtration medium of claim 1, comprising: 前記ナノファイバーウェブは、少なくとも約７０％の多孔性、多くとも約１５μｍの平均流量孔サイズ、及び１２５Ｐａで約８７０ｃｍ3／ｃｍ2／分〜約６０００ｃｍ3／ｃｍ2／分のフレーザー空気透過性を有する、請求項１に記載の空気濾過媒体。 The nanofiber web is at least about 70% porosity, mean flow pore size of about 15μm at most, and about 870cm 3 / cm 2 / min to about 6000cm 3 / cm 2 / min Fraser air permeability at 125Pa The air filtration medium according to claim 1, comprising:
JP2016525568A 2013-10-21 2014-10-21 Electret nanofiber webs as air filtration media Active JP6554462B2 (en)

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US201361893316P 2013-10-21 2013-10-21
US61/893,316 2013-10-21
PCT/US2014/061483 WO2015061257A1 (en) 2013-10-21 2014-10-21 Electret nanofibrous web as air filtration media

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